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Chemical, Electrical and Tactile Sensitivity Changes After Middle Ear Surgery.

Robert Pellegrino1,2, Thomas Hummel1

  • 1Department of Otorhinolaryngology, Smell and Taste Clinic, "Technische Universität Dresden", Dresden, Germany.

The Annals of Otology, Rhinology, and Laryngology
|January 23, 2020
PubMed
Summary

Middle ear surgery can impair taste function, affecting both electrical and chemical taste responses. While smell and touch remain largely unaffected, taste loss significantly impacts quality of life, warranting gustometry assessment.

Keywords:
electrogustometryimpairmentmiddle ear surgerysensitivitytaste

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Area of Science:

  • Otolaryngology
  • Neuroscience
  • Sensory Science

Background:

  • Middle ear surgery can damage the chorda tympani nerve, leading to taste disturbances.
  • Post-surgical taste loss may be accompanied by reduced tactile sensitivity.
  • The impact on oral processing senses requires further investigation.

Purpose of the Study:

  • To quantify changes in electrical, chemical, and tactile sensitivity after middle ear surgery.
  • To assess olfactory function following middle ear procedures.
  • To evaluate the recovery patterns of taste and touch sensation over time.

Main Methods:

  • Prospective cohort study design.
  • Sensitivity thresholds measured using electrogustometry, taste strips, Sniffin' Sticks, and Von Frey Hairs.
  • Measurements taken pre-surgery and at approximately 5 and 23 days post-surgery.

Main Results:

  • A decline in both chemical and electrical taste responses was observed.
  • Electrical taste response showed greater sensitivity to changes and no recovery.
  • Mechanosensory function of the anterior tongue and olfactory function were not significantly affected.

Conclusions:

  • Middle ear surgery alters taste responses, but not mechanosensory or olfactory function.
  • Taste loss negatively impacts patients' quality of life.
  • Gustometry is recommended for assessing taste function in patients post-middle ear surgery.